University libraries response to COVID-19 pandemic: A developing country perspective     

Muhammad Rafiq  Syeda Hina Batool  Amna Farzand Ali  Midrar Ullah 《The Journal of Academic Librarianship》2021,47(1):102280

The purpose of this study was to explore the university libraries' response during the COVID-19 pandemic and determine their working practices, services patterns, strategies applied, and role played. This study is a qualitative exploration by collecting data through in-depth interviews of purposely selected Heads of seven university libraries. The interview recordings were transcribed, translated, and analyzed thematically. The majority of the university libraries were physically closed for patrons in this pandemic but engaged with the users. Libraries revamped their web pages, reassigned resources, and planned robust online offerings. The university portal and other social media tools were less used communication tools during the pandemic. Library staff worked from home and there was a sense of over burden because of 24/7 connectivity and without any formal working policy addressing the new working routines. University librarians felt that digital divide, lack of digital literacy skills, and slow internet speed were the major barriers in their transition from physical to online mode and less use of library's online resources and web portals. Libraries see their individual and collective roles of societal and educational dimensions during these uncertain times. The study also made recommendations for the betterment of libraries' role in such situations.  相似文献   

Manipulating Spin Polarization of Defected Co3O4 for Highly Efficient Electrocatalysis     

Li  Yue  Wang  Tianzuo  Asim  Muhammad  Pan  Lun  Zhang  Rongrong  Huang  Zhen-Feng  Chen  Zhichao  Shi  Chengxiang  Zhang  Xiangwen  Zou  Ji-Jun 《天津大学学报(英文版)》2022,28(3):163-173

Transactions of Tianjin University - Electrocatalytic water splitting is limited by kinetics-sluggish oxygen evolution, in which the activity of catalysts depends on their electronic structure....  相似文献   

Technology Usage for Education： Comparative Analysis Between Open and Distance Learning and Regular Students     

Hina Fatima  Fahad Anis  Hafiz Muhammad Umar Farooq 《美中教育评论》2014,(6):417-422

Education is the backbone for the development of society. With the advent of technology, it is becoming necessary and being used for the advancement of society. Technology is being used for education as being used in other important fields of life. Usage of technology for education can play a big part in bringing improvement in education For this purpose, this research aims to explore the usage and effects of technology for education. While using the survey method, a questionnaire was constructed for data collection. The sample of the study consists of graduate and postgraduate students from both ODL and regular universities and the sample size would be of 300 respondents （150 from each type of university） who were selected by using simple random sampling. The present study concluded that technology is widely used by both regular and ODL students. This study further concluded that ODL students are more dependent on technology as compared to regular students.  相似文献   

An investigation of the Gregorian chronology of early Islamic history : A Pilot Study     

Shaykh Muhammad al‐casnazāni al‐Husseini  Jamāl N. Hussein  Shetha al‐Dargazelli  Hamid M. An‐Ni'aymi  Louay J. Fatoohi 《Al-Masaq: Islam & the Medieval Mediterranean》1994,7(1):227-266

This pilot study presents a lunar and Gregorian chronology of the Sira, that is the biography of the prophet Muhammad. The paper discusses the problems surrounding the chronology of very early Islamic history, namely, the pre‐Hijra era. This history is not covered by the Hijra calendar, and therefore, historians dated its events using other primitive dating systems, resulting in considerable difficulties and inaccuracies when comparing Gregorian dates of this early Islamic history. In order to overcome this problem and establish an accurate chronology of the early Islamic history, the introduction of a new lunar calendar (the Muhammadi calendar) which starts with the birth month and year of the prophet Muhammad, and covers all Islamic history including the pre‐Hijra era, is suggested. The Muhammadi calendar was used to study the earliest three versions of the Sira. All dated events of the Sira were compiled from these sources and presented, for the first time, according to their historical order. The Muhammadi dates of these events were then calculated. For the first time, a computer program was designed to convert the Muliammadi dates to their Christian equivalent. The program was then used to compute the Gregorian dates of the events of the Sira.  相似文献   

Robust stabilization of uncertain 2-D discrete-time delayed systems using sliding mode control     

Imran Ghous  Zhaoxia Duan  Jahanzeb Akhtar  Muhammad Jawad 《Journal of The Franklin Institute》2019,356(16):9407-9431

This paper aims to solve the problem of sliding mode control for an uncertain two-dimensional (2-D) systems with states having time-varying delays. The uncertainties in the system dynamics are constituted of mismatched uncertain parameters and the unknown nonlinear bounded function. The proposed problem utilizes the model transformation approach. By segregating the proper Lyapunov–Krasovskii functional in concert with the improved version of Wirtinger-based summation inequality, sufficient solvability conditions for the existence of linear switching surfaces have been put forward, which ensure the asymptotical stability of the reduced-order equivalent sliding mode dynamics. Then, we solve the controller synthesis problem by extending the recently proposed reaching law to 2-D systems, whose proportional part is appropriately scaled by the factor that does not depend on some constant terms but rather on current switching surface’s value, which in turn ensures the faster convergence and better robustness against uncertainties. Finally, the proposed results have been validated through an implementation to a suitable physical system.  相似文献   

Rating Pakistani medical journals using the principles of citation analysis     

Ullah M  Butt IF 《Health information and libraries journal》2008,25(1):50-54

OBJECTIVE: To quantify the impact of Pakistani Medical Journals using the principles of citation analysis. METHODS: References of articles published in 2006 in three selected Pakistani medical journals were collected and examined. The number of citations for each Pakistani medical journal was totalled. The first ranking of journals was based on the total number of citations; second ranking was based on impact factor 2006 and third ranking was based on the 5-year impact factor. Self-citations were excluded in all the three ratings. RESULTS: A total of 9079 citations in 567 articles were examined. Forty-nine separate Pakistani medical journals were cited. The Journal of the Pakistan Medical Association remains on the top in all three rankings, while Journal of College of Physicians and Surgeons-Pakistan attains second position in the ranking based on the total number of citations. The Pakistan Journal of Medical Sciences moves to second position in the ranking based on the impact factor 2006. The Journal of Ayub Medical College, Abbottabad moves to second position in the ranking based on the 5-year impact factor. CONCLUSION: This study examined the citation pattern of Pakistani medical journals. The impact factor, despite its limitations, is a valid indicator of quality for journals.  相似文献   

Terrorism in the Backyard: Coverage of London Attacks, 2005 by the British TV News Channels     

Muhammad Zubair Iqbal 《广播与电子媒介杂志》2017,61(2):449-466

The media-terrorism nexus needs further exploration. This article is a qualitative analysis of the coverage of London Attacks, 2005 by the British TV news channels. It aims to investigate and to empirically ascertain the veracity of the media-terrorism-symbiotic-relationship notion. The research draws a comparison with a similar study of the coverage of Mumbai attacks, 2008 and maintains that when the terrorist event happens on British soil, the symbiotic relationship theory is not verified completely. It concludes that British TV news channels, while reporting the home event of terrorism, do not overly focus on the theme of awe and terror. Instead, they are more responsible, careful, and nationalistic while covering the events of terrorism.  相似文献   

香草醛缩色氨酸与稀土镧、钕、钐、铈配合物的合成及表征     

阿米娜·买买提 《喀什师范学院学报》2002,23(6):39-42

合成了香草醛缩色氨酸席夫碱(简写为L)及其稀土La(III)、Nd(III)、Sm(III)、Ce(III)配合物,通过元素分析、摩尔电导、差热-热重分析、红外光谱、紫外光谱等手段.确定配合物为KRe(H2O)(NO3)·2H2O(Re=La,Nd,Sm,Ce).  相似文献   

Impact of light intensity on flowering time and plant quality of Antirrhinum majus L.cultivar Chimes White     

MUNIR Muhammad  JAMIL Muhammad  BALOCH Jalal-ud-din  KHATTAK Khalid Rehman 《浙江大学学报(A卷英文版)》2004,5(4)

Shades of different light intensities (29%, 43%, 54%, 60% or 68%) along with control (no shade) were studied to observe their effects on the flowering time and plant quality. A hyperbolic relationship was observed between different light intensities under shade, and time to flowering. The total number of flower buds showed a curvilinear relationship with light intensities. Growth parameters related to the plant characteristics such as plant height, leaf area and plant fresh weight were improved under shading treatments at the expense of flowering time and number of flower buds. However, both linear and polynomial models applied assumed that cultivar Chimes White was equally sensitive to light intensity throughout development.  相似文献   

Modeling of a Sn-Based HTM-Free Perovskite Solar Cell Using a One-Dimensional Solar Cell Capacitance Simulator Tool     

Eli Danladi  Muhammad Kashif  Andrew Ichoja  Bikimi Bitrus Ayiya 《天津大学学报(英文版)》2023,29(1):62-72

Tin(Sn)-based perovskite solar cells(PSCs) have received increasing attention in the domain of photovoltaics due to their environmentally friendly nature.In this paper,numerical modeling and simulation of hole transport material(HTM)-free PSC based on methyl ammonium tin triiodide(CH₃NH₃SnI₃) was performed using a one-dimensional solar cell capacitance simulator(SCAPS-1D) software.The effect of perovskite thickness,interface defect density,temperature,and electro...  相似文献